CVE-2021-20265

A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 12%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
-
oracletekelec_platform_distribution
7.4.0 ≤
𝑥
≤ 7.7.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.226-1
fixed
sid
6.11.6-1
fixed
trixie
6.11.5-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
bionic
not-affected
focal
not-affected
groovy
not-affected
trusty
ignored
xenial
not-affected
linux-aws
bionic
not-affected
focal
not-affected
groovy
not-affected
trusty
ignored
xenial
not-affected
linux-aws-5.0
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-aws-5.3
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-aws-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-aws-hwe
bionic
dne
focal
dne
groovy
dne
trusty
dne
xenial
not-affected
linux-azure
bionic
ignored
focal
not-affected
groovy
not-affected
trusty
ignored
xenial
not-affected
linux-azure-4.15
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-azure-5.3
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-azure-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-azure-edge
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-dell300x
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gcp
bionic
ignored
focal
not-affected
groovy
not-affected
trusty
dne
xenial
not-affected
linux-gcp-4.15
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gcp-5.3
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gcp-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gcp-edge
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gke-4.15
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gke-5.0
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gke-5.3
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gke-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-gkeop
bionic
dne
focal
not-affected
groovy
dne
trusty
dne
xenial
dne
linux-gkeop-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-hwe
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
not-affected
linux-hwe-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-hwe-5.8
bionic
dne
focal
not-affected
groovy
dne
trusty
dne
xenial
dne
linux-hwe-edge
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
ignored
linux-kvm
bionic
not-affected
focal
not-affected
groovy
not-affected
trusty
dne
xenial
not-affected
linux-lts-trusty
bionic
dne
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-lts-xenial
bionic
dne
focal
dne
groovy
dne
trusty
ignored
xenial
dne
linux-oem
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
ignored
linux-oem-5.10
bionic
dne
focal
not-affected
groovy
dne
trusty
dne
xenial
dne
linux-oem-5.6
bionic
dne
focal
not-affected
groovy
dne
trusty
dne
xenial
dne
linux-oem-osp1
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-oracle
bionic
not-affected
focal
not-affected
groovy
not-affected
trusty
dne
xenial
not-affected
linux-oracle-5.0
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-oracle-5.3
bionic
ignored
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-oracle-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-raspi
bionic
dne
focal
not-affected
groovy
not-affected
trusty
dne
xenial
dne
linux-raspi-5.4
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-raspi2
bionic
not-affected
focal
ignored
groovy
dne
trusty
dne
xenial
Fixed 4.4.0-1010.13
released
linux-raspi2-5.3
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
dne
linux-riscv
bionic
dne
focal
ignored
groovy
not-affected
trusty
dne
xenial
dne
linux-snapdragon
bionic
not-affected
focal
dne
groovy
dne
trusty
dne
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
kernel-default
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-default-base
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-default-kgraft
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-default-man
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-macros
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-source
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kernel-syms
suse enterprise server 12 SP3
4.4.180-94.150.1
fixed
kgraft-patch-4_4_180-94_150-default-1
suse enterprise server 12 SP3
4.3.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
bpftool
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-abi-whitelists
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-bootwrapper
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-debug
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-debug-devel
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-devel
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-doc
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-kdump
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-kdump-devel
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-rt
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-debug
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-debug-devel
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-debug-kvm
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-devel
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-doc
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-kvm
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-trace
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-trace-devel
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-rt-trace-kvm
RHEL 7
0:3.10.0-1160.21.1.rt56.1158.el7
fixed
kernel-tools
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-tools-libs
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
kernel-tools-libs-devel
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
perf
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
python-perf
RHEL 7
0:3.10.0-1160.21.1.el7
fixed
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=1908827
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b
https://www.oracle.com/security-alerts/cpuoct2021.html
https://bugzilla.redhat.com/show_bug.cgi?id=1908827
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b
https://www.oracle.com/security-alerts/cpuoct2021.html